Filter element and method of making the same



p 20, H. D. AUSTIN 2,131,004

FILTER ELEMENT AND METHOD OF MAKING THE SAME Filed Oct. 3, 1935 4 HARVEY Q' ZZEZZN TTORNEY Patented Sept. 2t), 1938 UNITED STATES PATENT OFFICE Harvey D. Austin, Akron, Ohio, assignor to The Hamlin Metal Products Company, Akron, Ohio, a, corporation of Ohio Application October 3, 1935, Serial No. 43,378 13 Claims. (Cl. 210 203) This invention relates to filter elements and to posed entirely within the cylindrical portion of methods of making the same, and more espethe canister. cially it relates to filtering elements for removing Each filtering element i8 is composed of matthe impurities from hot oil, and to procedure for ted, long staple, vegetable fibres that have been ents.

vide an improved oil-filtering element that will it has been found that best results are obtained not be deleteriously aifected by hot oil; that will y use of high grade jute c u olitoi'ilis 10 through which the oil may pass without adequate The jute, which in its natural state is soft, silky, 10

6 long staple, vegetable fibres treated to render which renders it hard and wiry. The treatment 1s a vertical, longitudinal sectional view of an aration of its fibres and W111 not swell under oil filter comprising the improved filtering eleseverest service conditions. 20 ment, in its preferred form. The layers of comminuted hard wood l9 be- Referring to the drawing, I0 is a metal canister tween the filtering elements l8 serve the purpos of generally cylindrical shape with rounded or of scattering or disseminating the streams of hot convex nd walls. The canister originally is oil passing th h he fil r n elements so h 5 made in two partswhich are telescoped and the full capacity of the latter may be utilized. It 26 30 and may comprise an internally threaded boss I! 1' Othe ise be afie d therebyinto whic a suitable inlet pipe may be The fabric casing 2| does not function as a threaded utlet of the canister is eccenfil ring medium, its sole purp being to p an outlet pipe l5 may be attached. The fixture the filtering material might form channels 35 40 There is an axial opening in the bottom of the prevent the formation of such channels. 40 canister provided with a threaded fixture 23, the The manufacture of the improved filtering elelatter having a plug 24 threaded thereinto. The ments from the raw jute is achieved in the folarrangement is such that the outlet of the filter lowing manner: 10 gallons of yellow distilled glycmay be at the bottom thereof if desired. erine is heated to a temperature of 180 F. after The filtering medium within the canister conwhich there is added thereto pound of phos- 45 sists of a unit comprising a plurality of filtering phate or iron, Fe(P04)z, and four ounces of elements l8, I8 arranged in a vertical series and chloral hydrate, CChCHO. The mixture is then separated by interposed layers of comminuted brought to a temperature of 240 F. and 2 pounds hard wood i9, i9. At each end of the filtering of black antimony, Sb2S3, added. This is mixed through the filtering unit and projects beyond nated therewith. 5 the bottom thereof, said filtering unit being dis- The eifect of the hot glycerine in the solution fibres so that the or fixed therein. The effect the fibres is to make them hard an wire-like. The finished product, however, is entirely devoid of resiliency, and may be compacted into a dense mat that tenaciously resists forces tending to effect separation or the fibres.

The filtering elements are capable of resisting the disintegrating efiect of hot oil, and achieve the other advantages set out in the foregoing statement of objects.

It will be understood that the term hard wood as used herein refers properties of being hard and close grained, and does not refer to wood from trees of any particular genus or species.

Modifications may be resorted to without departing from the spirit of the invention or the v scope of the appended claims, which are not limited wholly to the specific construction shown or ribeds l. A filterin unit comprising a layer of matted vegetable fibres, and a layer of comminuted hard maple wood in juxtapos'tion therewith so as to be penetrated in succession by the liquid to be filtered.

2. A filtering unit comprising a layer of matted and compacted jute" that has been impregnated with phosphate of iron, and a layer of comminut hard maple wood in juxtaposition th as to be penetrated in succession by the liquid to be filtered.

3. A filtering vegetable fibres iron.

4. A filtering element cons ting of long-staple, vegetable fibres impregnated with phosphate of iron and black antimony.

5. A filtering element consisting of matted jute,

element consisting of long-staple, impregnated with phosphate of the fibres of which are impregnated with black antimony.

6. The method of making a filtering element which comprises subjecting jute to the action of a softening agent to render the fibres thereof porous and then impregnating the porous fibres with phosphate of iron and black antimony to hard and tough.

'7. The method of making a filtering element which comprises impregnating jute fibres with phosphate of iron and black antimony in the presence of or 8. The method of making a filtering element which comprises subjecting jute to the action of glycerine and heat to soften the fibres thereof and then imp the porous fibres with phosantimony. p

9. The method of making a filtering element which comprises subjecting jute to the action of black antimony in the presence of chloral hydrate and a softening agent to eifect impregnation of the jute fibres with the metal salts and thereby to render them hard, wiry and non-resilient.

10. The method of making a filtering element which comprises softening jute fibres with glycerine and heat, and then impregnating them with phosphate of iron and black antimony in the presence of chloral hydrate to render them hard, wiry and non-resilient.

11. The method of making a filtering element which comprises treating jute with an aqueous solution of glycerine, chloral hydrate,

e method of making a filtering element with phosphate of iron. HARVEY D. AUSTIN. 

